Parts such as the Breather Cover: Tube,pcv, Clamp D 12.5 Tube, Washer,plug Drain 14, Cover Comp,breath are included in the Civic 2004 (4) 4dr Dx Side Srs (ka) Breather Cover parts fiche.
The Breather Cover is made up of components including this Cover Comp,breath which is the most expensive.
The component with the lowest price in the BREATHER COVER schematic is the Washer,plug Drain 14.